Click on an image to start the animation.

Animation 1: External surface of the blastocyst	Animation 2: Bisected blastocyst rotated about the y-axis.	Animation 3: Blastocyst cut in half along a plane perpendicular to that in Animation 2.
Animation 4 : Blastocyst with a segment of the trophoblast removed to show the blastocystic cavity and inner cell mass.	Animation 5 : As Animation 2 but rotating about the x-axis.	Animation 6 : As Animation 3 but rotating about the x-axis.

These 3D animations were made from the WinSurf reconstructions. To enable users to better study the reconstructions, we are also providing the original WinSurf files together with a WinSurf Viewer. This viewer will allow users to open WinSurf data files and view reconstructions with all the display options of the full reconstruction program. Models can be rotated about all three orthogonal axes, users can zoom in and out when viewing models and models can be translated. Also, the color and opacity of different objects in the models can be varied.